NDLI: Radial excitation temperatures in argon-oxygen and argon-air inductively coupled plasmas

Content Provider	Royal Society of Chemistry (RSC)
Author	Ishii, Izumi Montaser, Akbar
Copyright Year	1990
Abstract	Abel-inverted excitation temperatures are measured for Ar-O2 and Ar-air inductively coupled plasmas (ICPs) formed in a conventional torch with a 27.12-MHz crystal-controlled generator. The dependencies of temperature on gas composition (0, 5, 10, 20, 50 and 100% of either O2 or air in the outer flow), forward power (1.2 and 2.5 kW), observation height (6, 10 and 15 mm) and injector gas flow-rate (1 and 2 l min–1) are studied using Fe and Mo as the thermometric species. Results are compared with temperatures measured for Ar and Ar-N2 plasmas. When 5–100% O2 or 5–100% air is used in the outer flow instead of pure Ar, the axial temperatures measured at the 10-mm observation height and 1.2-kW forward power are greater than that of the commonly used Ar ICP, except when pure O2 is used in the outer flow. The highest axial temperatures are achieved when only 10% O2(6800 K) or 10% air (6400 K) are introduced into the outer flow. At 2.5 kW and 6 mm, the Ar-air plasma, with air in the outer flow, exhibits a temperature of approximately 6200 K, similar to that of a 2.5-kW Ar-N2 ICP or a 1.2-kW Ar ICP. In contrast, the axial temperature measured for a 2.5-kW Ar-O2 ICP with pure O2 in the outer flow is approximately 1500 K lower than that of the commonly used 1.2-kW Ar ICP. In general, the trends noted for the Ar-air ICPs are similar to those described earlier for the Ar-N2 ICPs.
Starting Page	57
Ending Page	60
Page Count	4
File Format	PDF
ISSN	02679477
Volume Number	5
Issue Number	1
Journal	Journal of Analytical Atomic Spectrometry
DOI	10.1039/JA9900500057
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Mo ICP Oxygen Blood plasma
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Analytical Chemistry

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